In October the Trump Hotel Collection warned customers it may have been subject to a similar breach between May 2014 and June 2015, though it is not clear if the hotels were targeted in a co-ordinated attack.

Ryan Wilk, director at cyber security firm NuData Security, warned that the wider hotel industry was at risk from similar malware.

“While we can’t know for sure what hackers long-term plans are, it does seem credible that they are targeting specific industries that likely have the same exploits in order to maximise their efforts before moving on to the next industry,” said Wilk.

He added that the hotel sector needed to up its ‘collective game’ and card breaches should not be considered ‘an unavoidable cost of doing business in the digital age’.

”Once they get the card numbers, hackers then sell them on the Dark Web, use them directly in credit card cycling scams, or tie them to other data leaks to create full personas ripe for identity theft or fraudulent account creation," he said.

“If the information is out there, it’s only a matter of time before it’s tested and used.”

Hilton Worldwide said in a statement that it was ‘strongly committed’ to protecting guests privacy and regretted ‘any inconvenience this may have caused customers’.